package com.yukuno.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.yukino.common.constant.AuthServerConstant;
import com.yukino.common.exception.BizCodeEnume;
import com.yukino.common.utils.R;
import com.yukino.common.vo.MemberRespVo;
import com.yukuno.gulimall.auth.feign.MemberFeignService;
import com.yukuno.gulimall.auth.feign.ThirdPartFeignService;
import com.yukuno.gulimall.auth.vo.UserLoginVo;
import com.yukuno.gulimall.auth.vo.UserRegistVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {
    @Autowired
    ThirdPartFeignService thirdPartFeignService;
    @Autowired
    StringRedisTemplate redisTemplate;
    @Autowired
    MemberFeignService memberFeignService;

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {
        // TODO 1、接口防刷

        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if(System.currentTimeMillis() - l < 60000) {
                // 60秒内不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(), BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        // 2、验证码再次校验。redis.存key-phone，value-code
        String code = UUID.randomUUID().toString().substring(0, 5);
        String subString = code+"_"+System.currentTimeMillis();

        // redis缓存验证码，防止同一个phone在60秒内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone, subString, 10, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone, code);
        return R.ok();
    }

    /**
     * TODO 重定向携带数据，利用session原理。将数据放在session中。只要跳到下一个页面取出这个数据后，session里面的数据就会删掉
     *
     * TODO 分布式下的session问题
     * @param vo 将请求中携带的数据转化为视图类对象
     * @param result jsr303校验结果
     * @param redirectAttributes 重定向携带数据
     * @return
     */
    @PostMapping("/register")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes){
        if (result.hasErrors()) {
//            Map<String, String> errors = new HashMap<>();

//            result.getFieldErrors().stream().map(fieldError -> {
//                String field = fieldError.getField();
//                String defaultMessage = fieldError.getDefaultMessage();
//                errors.put(field, defaultMessage);
//            });
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(fieldError -> {
                return fieldError.getField();
            }, fieldError -> {
                return fieldError.getDefaultMessage();
            }));
            redirectAttributes.addFlashAttribute("errors", errors);
            // 校验出错，转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }
        // 1、校验验证码
        String code = vo.getCode();

        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)){

            if (code.equals(s.split("_")[0])){
                // 删除验证码;令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());

                // 验证码通过 真正注册，调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if (r.getCode() == 0) {
                    // 注册成功回到登录页
                    return "redirect:http://auth.gulimall.com/login.html";
                } else {
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg", r.getData(new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors", errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            } else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                redirectAttributes.addFlashAttribute("errors", errors);
                // 校验出错，转发到注册页
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors", errors);
            // 校验出错，转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }



    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session) {
        R login = memberFeignService.login(vo);
        if (login.getCode() == 0) {
            // 成功
            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {
            });
            // 成功放到session中
            session.setAttribute(AuthServerConstant.LOGIN_USER, data);
            return "redirect:http://gulimall.com";
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("msg", login.getData("msg", new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null) {
            // 没登录
            return "login";
        } else {
            return "redirect:http://gulimall.com";
        }

    }
}
